Bi-Center Bit 6-1/2 Inch x7-1/2 Inch Dual Drill Bit Of Oilfield Drilling Tool 1. Specification A variety of Bi-Center bits are available from us in .....
PDC Button Bit 8-1/2Inch Bi Center Drill Bit With 13mm PDC Cutter 1. Specification A variety of Bi-Center bits are available from us in both Steel and ...